Downloaded Taltan (Tahltan) keyboard and it is not working help

My laptop has Windows 10, the macrons and underline accent are not working. When I hit a and then the back slash / a/. I don’t know how to fix it. I downloaded the taltan keyboard yesterday.

Can you double check whether you have selected the keyboard before starting to type the sequence?

If the keyboard is selected, you should see the keyboard icon on the taskbar.